Maybe www.achtungpanzer.com
Which abbreviations are you having trouble with?
Pzkpfw is Panzer KampfWagen, Armoured war vehicle
S.PzAbt is Schweres Panzer Abteilung.. Heavy armoured division..
PzKp is PanzerKorps.. Armoured Corps.
Ausf. is Ausfuhrung.. Model/version
Stug is SturmGeschutz.. Assault gun
Those two are the ones I can remember off hand just now.